I purchased a 2002 sportsman 700 the the previous owner ran it out of oil and the crank froze up. My question is if a 700 out of a 2005 sportsman EFI would fit? I have not decided if I am going to try to rebuild or replace it and I found the 05 EFI motor on ebay.

*frames, you will need to fabricate custom motor mounts.
*you will need an airbox from an 05 or newer sportsman 700 EFI too
*you will need the entire fuel deliverly system from an 05 700 EFI or newer (injectors included)
*you will need a new CDI from an 05 or newer 700 EFI.
*you will need to replace the full wire harness with an 05 or newer 700EFI

in short, this will be a big headace and not worth it. you cant throw in an EFI motor and use a carb on it, so everything would have to be converted to EFI, big pain in the ass and will be very expensive. plus, like i said, the frames are different. better of to rebuild the motor you have.